Tools · Monte Carlo
Roulette Martingale Simulator
This roulette Martingale simulator shows how often the doubling progression breaks, and what it costs when it does.
Base bet
Table limit
Spins
Sessions
Distribution of session resultsloss ← | → profit
−$1,000$0+$650
hover a bar · red bars are losing sessions, green winning, the pale bar straddles $0
Reading the result
With a $10 base and a $1,000 limit the progression can absorb 6 consecutive losses. In 21.8% of 2,000 sessions of 100 spins it hit that wall at least once. Most sessions still end slightly ahead (61.3%); the mean is −$86.56 because the broken sessions are expensive.
Method and assumptions
Even-money bets from a $1,000 bankroll. Doubling after each loss; reset to base after a win or when the next doubling would exceed the limit. Seeded generator.